[PATCH 2/2] mmc: dw_mmc: add dw_mmc-k3 for k3 platform
Zhangfei Gao
zhangfei.gao at linaro.org
Fri Nov 8 00:38:47 EST 2013
Add dw_mmc-k3.c for k3v2, support sd/emmc
Signed-off-by: Zhangfei Gao <zhangfei.gao at linaro.org>
Tested-by: Zhigang Wang <brooke.wangzhigang at huawei.com>
---
.../devicetree/bindings/mmc/k3-dw-mshc.txt | 83 +++++++
drivers/mmc/host/Kconfig | 10 +
drivers/mmc/host/Makefile | 1 +
drivers/mmc/host/dw_mmc-k3.c | 247 ++++++++++++++++++++
4 files changed, 341 insertions(+)
create mode 100644 Documentation/devicetree/bindings/mmc/k3-dw-mshc.txt
create mode 100644 drivers/mmc/host/dw_mmc-k3.c
diff --git a/Documentation/devicetree/bindings/mmc/k3-dw-mshc.txt b/Documentation/devicetree/bindings/mmc/k3-dw-mshc.txt
new file mode 100644
index 0000000..ea858f4
--- /dev/null
+++ b/Documentation/devicetree/bindings/mmc/k3-dw-mshc.txt
@@ -0,0 +1,83 @@
+* Hisilicon specific extensions to the Synopsys Designware Mobile
+ Storage Host Controller
+
+Read synopsis-dw-mshc.txt for more details
+The Synopsys designware mobile storage host controller is used to interface
+a SoC with storage medium such as eMMC or SD/MMC cards. This file documents
+differences between the core Synopsys dw mshc controller properties described
+by synopsis-dw-mshc.txt and the properties used by the Hisilicon specific
+extensions to the Synopsys Designware Mobile Storage Host Controller.
+
+Required Properties:
+
+* compatible: should be
+ - "hisilicon,hi4511-dw-mshc": for controllers with hi4511
+ specific extentions.
+* reg: should be address and size of mmc controller
+* vmmc-supply: should be vmmc used in dwmmc
+* fifo-depth: should be provided if register can not provide correct value
+* tuning-table: should be array to tune mmc controller, including clock rate
+ to be set and values for setting optional register.
+
+Optional properties:
+
+/* These registers from pctrl node used for tuning mmc controller if required */
+* clken-reg: should be clock enable register and offset bit
+* drv-sel-reg: should be driver delay select register, start bit and bits numbers
+* sam-sel-reg: should be sample delay select register, start bit and bits numbers
+* div-reg: should be divider register, start bit and bits numbers
+
+Example:
+
+ /* SoC portion */
+ dwmmc_0: dwmmc0 at fcd03000 {
+ compatible = "hisilicon,hi4511-dw-mshc";
+ reg = <0xfcd03000 0x1000>;
+ interrupts = <0 16 4>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ clocks = <&clk_sd>, <&clk_ddrc_per>;
+ clock-names = "ciu", "biu";
+ clken-reg = <0x1f8 0>;
+ drv-sel-reg = <0x1f8 4 4>;
+ sam-sel-reg = <0x1f8 8 4>;
+ div-reg = <0x1f8 1 3>;
+ tuning-table =
+ <180000000 6 6 13 13 25000000>,
+ <0 0 0 0 0 0>,
+ <360000000 6 4 2 0 50000000>,
+ <180000000 6 4 13 13 25000000>,
+ <360000000 6 4 2 0 50000000>,
+ <720000000 6 1 9 4 100000000>,
+ <0 0 0 0 0 0>,
+ <360000000 7 1 3 0 50000000>;
+ };
+
+ /* Board portion */
+ dwmmc0 at fcd03000 {
+ num-slots = <1>;
+ vmmc-supply = <&ldo12>;
+ fifo-depth = <0x100>;
+ supports-highspeed;
+ pinctrl-names = "default";
+ pinctrl-0 = <&sd_pmx_pins &sd_cfg_func1 &sd_cfg_func2>;
+ slot at 0 {
+ reg = <0>;
+ bus-width = <4>;
+ disable-wp;
+ cd-gpios = <&gpio10 3 0>;
+ };
+ };
+
+PCTRL: Peripheral misc control register
+
+Required Properties:
+- compatible: "hisilicon,pctrl"
+- reg: Address and size of pctrl.
+
+Example:
+
+ pctrl: pctrl at fca09000 {
+ compatible = "hisilicon,pctrl";
+ reg = <0xfca09000 0x1000>;
+ };
diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index 7fc5099..45aaa2d 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -575,6 +575,16 @@ config MMC_DW_SOCFPGA
This selects support for Altera SoCFPGA specific extensions to the
Synopsys DesignWare Memory Card Interface driver.
+config MMC_DW_K3
+ tristate "K3 specific extensions for Synopsys DW Memory Card Interface"
+ depends on MMC_DW
+ select MMC_DW_PLTFM
+ select MMC_DW_IDMAC
+ help
+ This selects support for Hisilicon K3 SoC specific extensions to the
+ Synopsys DesignWare Memory Card Interface driver. Select this option
+ for platforms based on Hisilicon K3 SoC's.
+
config MMC_DW_PCI
tristate "Synopsys Designware MCI support on PCI bus"
depends on MMC_DW && PCI
diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
index c41d0c3..64f5f8d 100644
--- a/drivers/mmc/host/Makefile
+++ b/drivers/mmc/host/Makefile
@@ -43,6 +43,7 @@ obj-$(CONFIG_MMC_DW) += dw_mmc.o
obj-$(CONFIG_MMC_DW_PLTFM) += dw_mmc-pltfm.o
obj-$(CONFIG_MMC_DW_EXYNOS) += dw_mmc-exynos.o
obj-$(CONFIG_MMC_DW_SOCFPGA) += dw_mmc-socfpga.o
+obj-$(CONFIG_MMC_DW_K3) += dw_mmc-k3.o
obj-$(CONFIG_MMC_DW_PCI) += dw_mmc-pci.o
obj-$(CONFIG_MMC_SH_MMCIF) += sh_mmcif.o
obj-$(CONFIG_MMC_JZ4740) += jz4740_mmc.o
diff --git a/drivers/mmc/host/dw_mmc-k3.c b/drivers/mmc/host/dw_mmc-k3.c
new file mode 100644
index 0000000..881d2f4
--- /dev/null
+++ b/drivers/mmc/host/dw_mmc-k3.c
@@ -0,0 +1,247 @@
+/*
+ * Copyright (c) 2013 Linaro Ltd.
+ * Copyright (c) 2013 Hisilicon Limited.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/mmc/host.h>
+#include <linux/mmc/dw_mmc.h>
+#include <linux/of_address.h>
+
+#include "dw_mmc.h"
+#include "dw_mmc-pltfm.h"
+
+#define TABLE_WIDTH 6
+#define TABLE_HEIGHT 8
+struct dw_mci_k3_priv_data {
+ int old_timing;
+ u32 table[TABLE_WIDTH * TABLE_HEIGHT];
+ u32 clken_reg;
+ u32 clken_bit;
+ u32 sam_reg;
+ u32 sam_off;
+ u32 sam_bits;
+ u32 drv_reg;
+ u32 drv_off;
+ u32 drv_bits;
+ u32 div_reg;
+ u32 div_off;
+ u32 div_bits;
+};
+
+static void __iomem *pctrl;
+static DEFINE_SPINLOCK(mmc_tuning_lock);
+
+static u32 dw_mci_k3_delay(u32 val, u32 para, u32 off, u32 len)
+{
+ u32 i;
+
+ if (para >= 0) {
+ for (i = 0; i < len; i++) {
+ if (para % 2)
+ val |= 1 << (off + i);
+ else
+ val &= ~(1 << (off + i));
+ para = para >> 1;
+ }
+ }
+ return val;
+}
+
+static void dw_mci_k3_set_timing(struct dw_mci_k3_priv_data *priv,
+ u32 sam, u32 drv, u32 div)
+{
+ u32 val;
+ unsigned long flags;
+
+ if (!pctrl || !priv->clken_reg || !priv->sam_reg
+ || !priv->drv_reg || !priv->div_reg)
+ return;
+
+ spin_lock_irqsave(&mmc_tuning_lock, flags);
+
+ val = readl(pctrl + priv->clken_reg);
+ val &= ~(1 << priv->clken_bit);
+ writel(val, pctrl + priv->clken_reg);
+
+ val = readl(pctrl + priv->sam_reg);
+ val = dw_mci_k3_delay(val, sam, priv->sam_off, priv->sam_bits);
+ writel(val, pctrl + priv->sam_reg);
+
+ val = readl(pctrl + priv->drv_reg);
+ val = dw_mci_k3_delay(val, drv, priv->drv_off, priv->drv_bits);
+ writel(val, pctrl + priv->drv_reg);
+
+ val = readl(pctrl + priv->div_reg);
+ val = dw_mci_k3_delay(val, div, priv->div_off, priv->div_bits);
+ writel(val, pctrl + priv->div_reg);
+
+ val = readl(pctrl + priv->clken_reg);
+ val |= 1 << priv->clken_bit;
+ writel(val, pctrl + priv->clken_reg);
+
+ spin_unlock_irqrestore(&mmc_tuning_lock, flags);
+}
+
+static void dw_mci_k3_tun(struct dw_mci *host, int timing)
+{
+ struct dw_mci_k3_priv_data *priv = host->priv;
+ u32 *table = &priv->table[TABLE_WIDTH * timing];
+ int ret;
+
+ if (priv->old_timing == timing)
+ return;
+
+ ret = clk_set_rate(host->ciu_clk, table[0]);
+ if (ret) {
+ dev_err(host->dev, "clk_set_rate failed\n");
+ return;
+ }
+ dw_mci_k3_set_timing(priv, (table[3] + table[4]) / 2,
+ table[2], table[1]);
+ host->bus_hz = table[5];
+ priv->old_timing = timing;
+}
+
+static void dw_mci_k3_set_ios(struct dw_mci *host, struct mmc_ios *ios)
+{
+ dw_mci_k3_tun(host, ios->timing);
+}
+
+static int dw_mci_k3_setup_clock(struct dw_mci *host)
+{
+ dw_mci_k3_tun(host, MMC_TIMING_LEGACY);
+ return 0;
+}
+
+static int dw_mci_k3_parse_dt(struct dw_mci *host)
+{
+ struct dw_mci_k3_priv_data *priv;
+ struct device_node *np = host->dev->of_node, *node;
+ u32 data[3];
+ int ret;
+
+ priv = devm_kzalloc(host->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv) {
+ dev_err(host->dev, "mem alloc failed for private data\n");
+ return -ENOMEM;
+ }
+ priv->old_timing = -1;
+ host->priv = priv;
+
+ ret = of_property_read_u32_array(host->dev->of_node, "tuning-table",
+ priv->table, TABLE_WIDTH * TABLE_HEIGHT);
+ if (ret) {
+ dev_err(host->dev, "not found tuning-table\n");
+ return -EINVAL;
+ }
+
+ if (!pctrl) {
+ node = of_find_compatible_node(NULL, NULL, "hisilicon,pctrl");
+ pctrl = of_iomap(node, 0);
+ }
+
+ ret = of_property_read_u32_array(np, "clken-reg", data, 2);
+ if (!ret) {
+ priv->clken_reg = data[0];
+ priv->clken_bit = data[1];
+ }
+
+ ret = of_property_read_u32_array(np, "drv-sel-reg", data, 3);
+ if (!ret) {
+ priv->drv_reg = data[0];
+ priv->drv_off = data[1];
+ priv->drv_bits = data[2];
+ }
+
+ ret = of_property_read_u32_array(np, "sam-sel-reg", data, 3);
+ if (!ret) {
+ priv->sam_reg = data[0];
+ priv->sam_off = data[1];
+ priv->sam_bits = data[2];
+ }
+
+ ret = of_property_read_u32_array(np, "div-reg", data, 3);
+ if (!ret) {
+ priv->div_reg = data[0];
+ priv->div_off = data[1];
+ priv->div_bits = data[2];
+ }
+
+ return 0;
+}
+
+static unsigned long k3_dwmmc_caps[4] = {
+ MMC_CAP_4_BIT_DATA | MMC_CAP_SD_HIGHSPEED,
+ MMC_CAP_8_BIT_DATA | MMC_CAP_MMC_HIGHSPEED,
+ 0,
+ 0,
+};
+
+static const struct dw_mci_drv_data k3_drv_data = {
+ .caps = k3_dwmmc_caps,
+ .set_ios = dw_mci_k3_set_ios,
+ .setup_clock = dw_mci_k3_setup_clock,
+ .parse_dt = dw_mci_k3_parse_dt,
+};
+
+static const struct of_device_id dw_mci_k3_match[] = {
+ { .compatible = "hisilicon,hi4511-dw-mshc",
+ .data = &k3_drv_data, },
+ {},
+};
+MODULE_DEVICE_TABLE(of, dw_mci_k3_match);
+
+static int dw_mci_k3_probe(struct platform_device *pdev)
+{
+ const struct dw_mci_drv_data *drv_data;
+ const struct of_device_id *match;
+
+ match = of_match_node(dw_mci_k3_match, pdev->dev.of_node);
+ drv_data = match->data;
+
+ return dw_mci_pltfm_register(pdev, drv_data);
+}
+
+static int dw_mci_k3_suspend(struct device *dev)
+{
+ struct dw_mci *host = dev_get_drvdata(dev);
+
+ return dw_mci_suspend(host);
+}
+
+static int dw_mci_k3_resume(struct device *dev)
+{
+ struct dw_mci *host = dev_get_drvdata(dev);
+ struct dw_mci_k3_priv_data *priv = host->priv;
+
+ priv->old_timing = -1;
+ dw_mci_k3_tun(host, MMC_TIMING_LEGACY);
+
+ return dw_mci_resume(host);
+}
+
+SIMPLE_DEV_PM_OPS(dw_mci_k3_pmops, dw_mci_k3_suspend, dw_mci_k3_resume);
+
+static struct platform_driver dw_mci_k3_pltfm_driver = {
+ .probe = dw_mci_k3_probe,
+ .remove = dw_mci_pltfm_remove,
+ .driver = {
+ .name = "dwmmc_k3",
+ .of_match_table = dw_mci_k3_match,
+ .pm = &dw_mci_k3_pmops,
+ },
+};
+
+module_platform_driver(dw_mci_k3_pltfm_driver);
+
+MODULE_DESCRIPTION("K3 Specific DW-MSHC Driver Extension");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:dwmmc-k3");
--
1.7.9.5
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